JPH07256204A - Repair of coated surface - Google Patents

Abstract

PURPOSE:To make it possible to easily repair the coating defect generated on a coated body surface of, e.g. an automobile. CONSTITUTION:First, a cause for coat defects is eliminated by grinding a clear coating 7 and a part of a top coating 6 around the defectively coated part of a body W, then an opening 1a for repair is positioned in the center of a recessed part (p) for repair by making a base plate 1 of a magnet sheet attracted to the body W magnetically, and either one of narrow slits (h) of a first masking plate 2 of clear sheet is positioned over the opening 1a for repair to fit into the center of the recessed part for repair (p). In addition, a slit 3 with a large diameter is positioned in the center of the recessed part (p) by causing a second masking plate 3 of the magnet sheet to be attracted magnetically to the first masking plate 2. Further, a finishing coating is sprayed through the narrow slit (h), and a clear coat is applied by a spray gun through the large diameter slit 3a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repairing method capable of easily repairing a coating defect that has occurred on the painted surface of an automobile body.

[0002]

2. Description of the Related Art Conventionally, for example, as shown in FIG. 6, when painting a vehicle body, a body W is usually coated with an undercoat 51, an intermediate coat 52, and an overcoat 53, and finally a clear coat 54 is applied. Go and finish.

At this time, the top coating 53 and the clear coating 54
If a dust defect or a defective spot occurs between the parts, the area around the defective part is polished with paper or the like to remove the cause of the defect, and then the masking tape 55 is formed around the repairing recess p as shown in FIG. Affix.

Then, as shown in FIG. 8, a top coating 53a is applied from above by a spray gun 56a, and then a clear coating 54a is applied by a spray gun 56b as shown in FIG. Forcibly dry.

Finally, the repair portion was polished to complete the repair.

[0006]

However, the conventional methods as described above have a problem that it takes time and labor to attach and peel off the masking tape 55, and the cost of the masking tape increases. Moreover, there is a problem that even if the defective portion has a small area, the repair surface extends over a wide area and the polishing work is time-consuming.

Therefore, there has been a demand for a repair method which can reduce the number of working steps and is inexpensive.

[0008]

In order to solve such a problem, the present invention provides a step of removing a cause of defects by polishing a part of clear coating and top coating around the defective coating portion and removing the cause of the defective coating. A step of bringing the small-diameter slit holes of the first masking member close to each other, and spray-applying the top-coat paint through the small-diameter slit holes, and bringing the large-diameter slit hole of the second masking member close to the spray-coated portion. A step of spray-coating clear paint through the large-diameter slit hole was provided so that the diameter of the small-diameter slit hole was changed corresponding to the area of the defective coating spot.

After clearing and clearing a part of the clear coating and the top coating around the defective coating portion to eliminate the cause of the defective coating,
A base member made of a magnet sheet is magnetically adhered to the coated surface, a repair opening provided in the base member is aligned with the center of a polishing portion, and a first masking member is positioned on the base member to form a first masking member. Any one of a plurality of small-diameter slit holes provided in the masking member is aligned with the center of the polishing portion, and a second masking member made of a magnet sheet is magnetically adhered to the first masking member. The large-diameter slit hole provided in the second masking member is aligned with the center of the polishing portion, and the top-coat paint is spray-applied through the small-diameter slit hole first, and then the first masking member is extracted to obtain the large-diameter The clear paint was sprayed through the slit holes.

[0010]

[Function] After polishing the area around the defective coating to eliminate the cause of the defect, spray the top coating through the small-diameter slit hole close to the polished location. Limited amount of paint can be applied. Then, if the small-diameter slit hole is changed in accordance with the area of the defective coating portion, the coating amount can be made more appropriate.

Similarly, the clear paint to be applied from above can be applied by spraying through a large-diameter slit hole close to the repaired place, so that an appropriate amount of clear paint can be applied, for example, in the subsequent steps. The polishing work can be reduced.

Further, the base member and the second masking member are made of a magnet sheet, and the first masking member is sandwiched between the base member magnetically attached to the vehicle body and the second masking member magnetically attached to the base member. By doing so, it is possible to perform the masking treatment extremely easily as compared with the conventional masking tape. In addition, it is cheaper than a masking tape because it can be used repeatedly many times.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for repairing a painted surface of the present invention will be described with reference to the attached drawings. FIG. 1 is a plan view of a base member, a first masking member and a second masking member, and FIGS. 2 to 5 are process diagrams of the repair method.

The coating surface repairing method of the present invention is applied as a repairing method when a coating failure of a diameter of 2 mm or less occurs in coating on the body of an automobile, and three repairing jigs as shown in FIG. 1 are used. I am trying to use it.

That is, in the embodiment, this repair jig is
A base plate 1 made of a magnet sheet of about 100 mm × 100 mm × 1 mm as a base member, a first masking plate 2 made of a clear sheet of about 270 mm × 270 mm × 0.2 mm as a first masking member, and a second
Second masking plate 3 made of a magnet sheet with a size of 100 mm x 100 mm x 1 mm as a masking member for
Each plate 1, 2, 3 is provided with an opening or a hole.

That is, the repair opening 1a having a diameter of about 60 mm is provided in the central portion of the base plate 1, and the first masking plate 2 has a plurality of small-diameter slit holes h having different diameters of 60 mm or more. It is provided with a space,
A large-diameter slit hole 3a having a diameter of about 50 mm is provided in the central portion of the second masking plate 3.

The small-diameter slit holes h, ... Have diameters of 0.5 mm, 0.7 mm, 0.8 mm, 1.0 mm,
There are a total of 9 pieces of 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm and 2.0 mm.

Next, a repair method using such a repair jig will be described.

As shown in FIG. 2, when the undercoat coating 4, the intermediate coating 5, the top coating 6, and the clear coating 7 are applied to the surface of the body W, a coating failure portion d having a diameter of 2 mm or less is formed on the surface of the top coating 6. When it occurs, first, a part of the clear coating 7 and the top coating 6 around the defective coating portion d including the defective coating portion d is polished with a paper of about # 1500 to 2000 to remove the cause of the defective coating.

For this reason, the defective coating spot d is shown in FIG.
As shown in FIG. 5, a repairing recess p is formed which increases or decreases according to the diameter of the coating failure.
Incidentally, the diameter of the repairing concave portion p is about 30 mm, and the diameter is slightly larger if the defective coating area is large, and slightly smaller if the defective area is smaller.

Then, the center of the repair opening 1a of the base plate 1 made of a magnet sheet is aligned with the center of the repair recess p to be magnetically adhered, and the center of the small-diameter slit hole h of the first masking plate 2 is placed on the center thereof. They are overlapped while being aligned with the center of the repair recess p.

At this time, the small-diameter slit hole h is selected to have a diameter substantially the same as the diameter of the defective coating portion d, but the first masking plate 2 is used although the small-diameter slit hole h has a small diameter. Is transparent, alignment with the center of the repairing recess p is easy.

Further, from above the large-diameter slit hole 3a of the second masking plate 3 made of a magnet sheet.
When the center of the magnetic field is aligned with the center of the repairing recess p and magnetically attached, 3
The plates 1, 2, 3 are positioned and fixed to the body W.

In such a state, as shown in FIG.
The top coat paint is spray-coated with the spray gun 8a through the small-diameter slit hole h of the masking plate 2. Then, the top-coat paint that has diffused through the small-diameter slit holes h is uniformly applied to the limited portion e in and around the repair recess p to form the top-coat coating film 6a.

Then, as in the embodiment, a small-diameter slit hole h having a diameter substantially equal to the diameter of the poorly-painted portion d is made to face a position separated by about 1 mm (the thickness of the base plate 1) from the surface of the paint, and the small-diameter slit hole h is formed. If the paint passing through is diffused, the passing paint spreads and diffuses from the repairing recess p having a diameter of about 30 mm, and the coating film 6a is applied to the peripheral limited portion e.
It was proved that the thickness of the film was flattened and the film thickness was not wasted.

Incidentally, the role of the second masking plate 3 during the overcoating is to play the role of the first masking plate 2
It is for positioning and fixing.

Next, the first masking plate 2 is removed, and as shown in FIG. 5, the clear paint is sprayed by the spray gun 8b through the large-diameter slit hole 3a of the second masking plate 3.

Then, the clear paint which has passed through the large-diameter slit hole 3a is diffused and spreads at the peripheral portion to form a clear paint film 7a which uniformly covers the top paint 6a.

Also in this case, the large-diameter slit hole 3a faces a position about 1 mm (thickness of the base plate 1) away from the coating surface, and the clear coating film 7a diffused through the large-diameter slit hole 3a. It was confirmed that the peripheral portion was also flattened uniformly.

Thus, the top coating film 6a and the clear coating film 7a
When the coating is applied, the base plate 1 and the second masking plate 3 are removed from the body W, the repair coating portion is locally forcedly dried, and after drying, the surface is smoothed by polishing.

At this time, since the useless paint is not applied, the polishing work is easy, and the number of steps can be reduced because the conventional masking tape is not attached or peeled off.

[0032]

EFFECT OF THE INVENTION After removing the cause of defects by polishing the coating surface around the defective coating portion, a small-diameter slit hole is brought close to the polished portion, and the top coat paint is spray-applied through the small-diameter slit hole. After that, a large-diameter slit hole was brought close to the location, and the clear paint was spray-applied through this large-diameter slit hole, so it was possible to efficiently apply an appropriate amount of paint for both the topcoat paint and the clear paint. It is possible to reduce the polishing work in the process of. Moreover, the amount of paint can be reduced. If the small-diameter slit hole is changed according to the area of the defective portion, the coating amount can be adjusted more appropriately. If the base member and the second masking member are made of a magnet sheet, and the first masking member is sandwiched between the base member and the second masking member to be magnetically adhered, it is attached like a conventional masking tape. The number of stripping steps can be reduced and the masking work is easy. Moreover, it is cheaper than a masking tape because it can be used repeatedly many times.

[Brief description of drawings]

FIG. 1 is a plan view of a base member, a first masking member, and a second masking member.

[Fig. 2] State diagram of defective coating

[Figure 3] State diagram with the defective coating removed

[Fig. 4] State diagram of repair top coating

[Figure 5] State diagram of repair clear coating

[Figure 6] State diagram with the conventional defective coating removed

FIG. 7 is a plan view showing a conventional masking procedure.

[Figure 8] State diagram of conventional repair top coating

[Figure 9] State diagram of conventional repair clear coating

[Explanation of symbols]

 1 Base plate 1a Repair opening 2 1st masking plate 3 2nd masking plate 3a Large diameter slit hole 6 Top coating 7 Clear coating d Coating failure point h Small diameter slit hole

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tadashi Kono 1907 Hirata-cho, Suzuka-shi, Mie Honda Motor Co., Ltd. Suzuka Works

Claims (2)

[Claims] 1. A repairing method for repairing a defective coating portion between a top coating and a clear coating, a step of polishing a part of the clear coating and the top coating around the defective coating portion to remove the cause of the defective coating. , 1st for polished parts
The step of bringing the small-diameter slit hole of the masking member close to and spray-applying the top coat paint through the small-diameter slit hole, and bringing the large-diameter slit hole of the second masking member close to the spray-coated portion, A method for repairing a painted surface, comprising a step of spray-coating clear paint through a large-diameter slit hole, wherein the diameter of the small-diameter slit hole is changed in accordance with the area of a defective coating spot. 2. A repairing method for repairing a defective coating portion between a top coating and a clear coating, after removing a cause of the defectiveness by polishing a part of the clear coating and the top coating around the defective coating portion. A base member made of a magnet sheet is magnetically adhered to the coated surface, a repair opening provided in the base member is aligned with the center of the polishing portion, and a first masking member is positioned on the base member. Any one of a plurality of small-diameter slit holes provided in the first masking member is aligned with the center of the polishing portion, and a second masking member made of a magnet sheet is placed on the first masking member. The large-diameter slit hole provided in the second masking member was magnetically adhered to the center of the polishing portion, and the top coat paint was initially spray-applied through the small-diameter slit hole. After that, the first masking member is extracted, and then a clear paint is spray-applied through a large-diameter slit hole.